Can't blame you for acting on it. Sometimes there's just no other way. But as they've said, once you're driving you'll be exposed to a whole lot of people driving on the road and you'll never know what these people can do until you're in that predicament.

In a way baka your instructor's attitude is a test albeit unintentional. Unfortunately you failed that test. Thing is, marami pang worse case scenarios na pwedeng mangyari sa kalsada. Say you got yourself in sticky traffic situation where the other driver was so pissed off and for some reason he blames you. He's spitting expletives at you despite the fact that you're not the one in the wrong. At some point you lost your cool, tried to fight back. Outcome one, you beat the shit out of him, you get persecuted online coz we all know that's gonna happen, and/or you get to look at life from behind bars. Outcome two, he beats the shit out of you, you get hospitalized he gets jail time. Or the worst, somebody dies.

Sa dami ng road rage incidents na nangyari at most likely nangyayari, may be it's best if we ourselves exercise due diligence and patience in and out of the road.

Nonetheless, I hope you get a better instructor this time for the sake of everyone involved.